万能适配器

来源：互联网发布：小学生编程入门编辑：程序博客网时间：2024/04/30 07:30

因为每次使用ListView和BaseAdapter，都要重复的写很多代码，所以我写了一个万能的ViewHolder，而不要每次都要写一个Holder，

    public class ViewHolder {        //用于保存子控件的容器        private SparseArray<View> mViews;        private int mPosition ;        private View mConvertView;        public ViewHolder(Context context , ViewGroup parent , int layouId , int position){            this.mPosition = position;            mViews = new SparseArray<View>();            mConvertView =               LayoutInflater.from(context).            inflate(layouId , parent ,false);            mConvertView.setTag(this);        } /**     * 通过viewId获取到控件     * @param viewId     * @param <T>     * @return     */    public <T extends  View>T getView(int viewId){        View view = mViews.get(viewId);        if (view == null) {            view = mConvertView.findViewById(viewId);            mViews.put(viewId , view);        }        return (T) view;    }    /*    *获取到复用的ConvertView    */    public View getConvertView() {        return mConvertView;    }    /**     *      * 复用Viewholder     */    public static ViewHolder getViewHolder(Context context ,         int position, int layouId ,View convertView,         ViewGroup   parent){        if (convertView == null){            return new ViewHolder(context , parent ,layouId ,             position);        }else {            ViewHolder viewHolder = (ViewHolder)             convertView.getTag();            viewHolder.mPosition = position;            return viewHolder;        }    }}

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